Paintings, graphics, sculptures, textiles, and furniture - Johannes Itten was an extraordinarily versatile artist who, during his six decades of creative work, also developed one of the most significant color theories of the 20th century. His artistic oeuvre is being scientifically explored for the first time based on 120,000 biographical documents and sources, and expanded by more than 1,000 works from all periods of his creation compared to the catalog raisonné of 1972. The three-volume catalog raisonné provides, with the latest provenance research, exhibition, and literature listings, a complete overview of the artistic cosmos of Johannes Itten for the first time.